Weekend weather: Winter storm advisory calls for heavy snow

Franklin Elementary School head custodian, Tom Hackathorn, clears snow from the main entrance to Jefferson Elementary School, during a break in the snowstorm, Thursday, Dec. 28, 2017, in Spokane, Wash. Hackathorn said he wanted to remove the snow before the freezing rain starts. Franklin students are attending classes at Jefferson for the school year as a new Franklin is being built. (Dan Pelle / The Spokesman-Review)
Wild turkeys make their way through the fresh snow near the corner of 37th Avenue and Lincoln Drive, Thursday, Dec. 28, 2017, in Spokane, Wash. (Dan Pelle / The Spokesman-Review)
A pair of City of Spokane snowplows run their blades along south Lincoln Street, Dec. 28, 2017. (Dan Pelle / The Spokesman-Review)
Post Falls residence Jeanie Nord uses her snow blower to clear her driveway on Thursday, Dec. 28, 2017. (Kathy Plonka / The Spokesman-Review)
City snow plows shuttle through downtown Spokane Thursday, Dec. 28, 2017. The snowstorm continued Friday. (Jesse Tinsley / The Spokesman-Review)
A worker at River Park Square plows off the crosswalk on Main Ave. and Post Street in downtown Spokane, Thursday, Dec. 28, 2017. A winter storm is expected to drop several inches Thursday and Friday. (Jesse Tinsley / The Spokesman-Review)
Drivers deal with the slow acumulation of snow in Spokane, Thursday, Dec. 28, 2017. A winter storm is expected to drop several inches Thursday and Friday. (Jesse Tinsley / The Spokesman-Review)
Riverside Avenue is slowly covered with snow as Thursday's winter storm blows through Spokane. (Liz Kishimoto / The Spokesman-Review)
Snow and rain are expected through the end of this week and into the weekend as two Pacific storms wash over Washington. The National Weather Service issued a winter storm watch for the Spokane area Thursday extending through the night, predicting heavy snow in the mountains and “a messy wintry mix” at lower altitudes.